When Transformers 2 was out there was an Art of Transformers movies book announced but it never happened, I think they are waiting for the third film so they have a decent amount of top art to include in one volume. Hopefully Predators will get a book, except for all the web images, none of the magazines articles pictured much of the Preds except for the same shots of the P1.
I'd really love a book covering P1, P2 and Predators. Many of the best behind the scenes and prop pics have been online anyway but the DVDs only include a handful of the 35mm slides images and Stan Winston Studio etc must have more than was printed in the Winston Effect book. I would definately pay for a book even if it had all of the images I've already seen.